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Chandra M, Yadav S, Rawat R, Choudhary RJ, Sinha AK, Sagdeo A, Singh MN, Singh K. Temperature dependent structural properties of Mn 1.90M 0.10O 3(M = Cr and Fe). J Phys Condens Matter 2023; 36:095401. [PMID: 37972396 DOI: 10.1088/1361-648x/ad0d28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 11/16/2023] [Indexed: 11/19/2023]
Abstract
The polycrystalline samples of Mn1.90Cr0.10O3(MCO) and Mn1.90Fe0.10O3(MFO) have been investigated for their temperature dependent magnetic and structural properties. The Cr and Fe substitutions have significant effect on the magnetic and structural properties of Mn2O3. Like pristine Mn2O3, the Cr and Fe substituted samples MCO and MFO also exhibit two antiferromagnetic transitions; one at ∼77 K, ∼80 K, respectively and another at ∼40 K. Our room temperature synchrotron x-ray powder diffraction (SXRD) results confirm that both the MCO and MFO samples crystallize in cubic symmetry. The temperature dependent SXRD results demonstrate the cubic to orthorhombic structural transition for the studied samples. The pristine Mn2O3shows cubic to orthorhombic transition around 310 K, whereas this structural transition shifted towards lower temperature side with these substitutions i.e. around 240 K for MCO and 260 K for MFO. Interestingly, the centrosymmetricPcabto non-centrosymmetricPca21change in symmetry is also resolved at the ferroelectric ordering temperature for MCO.
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Affiliation(s)
- Mohit Chandra
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - Satish Yadav
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - Rajeev Rawat
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - R J Choudhary
- UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452001, India
| | - A K Sinha
- HXAL, Synchrotrons Utilization Section, RRCAT, Indore 452013, India
- Department of Physics, School of Engineering, University of Petroleum and Energy Studies, Dehradun 248007, Uttarakhand, India
| | - A Sagdeo
- HXAL, Synchrotrons Utilization Section, RRCAT, Indore 452013, India
| | - M N Singh
- HXAL, Synchrotrons Utilization Section, RRCAT, Indore 452013, India
| | - Kiran Singh
- Department of Physics, Dr B. R. Ambedkar National Institute of Technology, Jalandhar 144008, India
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Kaur N, Khanna A, Kaur P, Singh MN, Sinha AK. Comparative study of the short-range structure of α-V 2O 5, α-TeO 2 and xV 2O 5-(100 - x)TeO 2 glasses using X-ray diffraction, Rietveld analysis and reverse Monte Carlo simulations. Acta Crystallogr B Struct Sci Cryst Eng Mater 2023; 79:55-63. [PMID: 36748898 DOI: 10.1107/s2052520622011581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 12/01/2022] [Indexed: 01/21/2023]
Abstract
Vanadium-tellurite glasses, tetragonal TeO2 and orthorhombic V2O5 crystalline samples were characterized for their atomic structure properties by synchrotron X-ray diffraction, pair distribution function analysis, reverse Monte Carlo simulations (RMC) and Rietveld analysis. The pair correlation function, G(r), of V2O5 shows the first peak at 1.61 Å. G(r) of TeO2 shows three peaks at 1.57, 2.13 and 2.88 Å due to Te-O linkages of three different lengths, whereas the Te-Te atomic pair correlation shows a peak at 3.85 Å. The average coordination number of V with O in crystalline V2O5 is 4.39 while that of Te with O in crystalline TeO2 is 3.71. G(r) of the vanadium tellurite glass shows the first peak at 1.90 Å due to overlapping Te-O and V-O atomic pair correlations. The RMC analysis on diffraction data of glasses found that the V-O coordination number is in the range 5.27-5.59 and the Te-O coordination number is 5.39-5.67. However, it is found that these coordination numbers cannot be clearly defined due to short-range disorder.
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Affiliation(s)
- Navjot Kaur
- Glass Physics and Sensors Laboratory, Department of Physics, Guru Nanak Dev University, Amritsar, India
| | - Atul Khanna
- Glass Physics and Sensors Laboratory, Department of Physics, Guru Nanak Dev University, Amritsar, India
| | - Puneet Kaur
- Glass Physics and Sensors Laboratory, Department of Physics, Guru Nanak Dev University, Amritsar, India
| | - M N Singh
- Hard X-ray Applications Laboratory, SUS, Raja Ramanna Centre for Advanced Technology, Indore, India
| | - A K Sinha
- Department of Physics, School of Engineering, University of Petroleum and Energy Studies, Dehra Dūn, Uttarakhand, India
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Parihar AK, Gupta S, Hazra KK, Lamichaney A, Sen Gupta D, Singh D, Kumar R, Singh AK, Vaishnavi R, Jaberson MS, Das SP, Dev J, Yadav RK, Jamwal BS, Choudhary BR, Khedar OP, Prakash V, Dikshit HK, Panwar RK, Katiyar M, Kumar P, Mahto CS, Borah HK, Singh MN, Das A, Patil AN, Nanda HC, Kumar V, Rajput SD, Chauhan DA, Patel MH, Kanwar RR, Kumar J, Mishra SP, Kumar H, Swarup I, Mogali S, Kumaresan D, Manivannan N, Gowda MB, Pandiyan M, Rao PJ, Shivani D, Prusti AM, Mahadevu P, Iyanar K, Das S. Multi-location evaluation of mungbean ( Vigna radiata L.) in Indian climates: Ecophenological dynamics, yield relation, and characterization of locations. Front Plant Sci 2022; 13:984912. [PMID: 36204050 PMCID: PMC9530336 DOI: 10.3389/fpls.2022.984912] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 08/18/2022] [Indexed: 06/01/2023]
Abstract
Crop yield varies considerably within agroecology depending on the genetic potential of crop cultivars and various edaphic and climatic variables. Understanding site-specific changes in crop yield and genotype × environment interaction are crucial and needs exceptional consideration in strategic breeding programs. Further, genotypic response to diverse agro-ecologies offers identification of strategic locations for evaluating traits of interest to strengthen and accelerate the national variety release program. In this study, multi-location field trial data have been used to investigate the impact of environmental conditions on crop phenological dynamics and their influence on the yield of mungbean in different agroecological regions of the Indian subcontinent. The present attempt is also intended to identify the strategic location(s) favoring higher yield and distinctiveness within mungbean genotypes. In the field trial, a total of 34 different mungbean genotypes were grown in 39 locations covering the north hill zone (n = 4), northeastern plain zone (n = 6), northwestern plain zone (n = 7), central zone (n = 11) and south zone (n = 11). The results revealed that the effect of the environment was prominent on both the phenological dynamics and productivity of the mungbean. Noticeable variations (expressed as coefficient of variation) were observed for the parameters of days to 50% flowering (13%), days to maturity (12%), reproductive period (21%), grain yield (33%), and 1000-grain weight (14%) across the environments. The genotype, environment, and genotype × environment accounted for 3.0, 54.2, and 29.7% of the total variation in mungbean yield, respectively (p < 0.001), suggesting an oversized significance of site-specific responses of the genotypes. Results demonstrated that a lower ambient temperature extended both flowering time and the crop period. Linear mixed model results revealed that the changes in phenological events (days to 50 % flowering, days to maturity, and reproductive period) with response to contrasting environments had no direct influence on crop yields (p > 0.05) for all the genotypes except PM 14-11. Results revealed that the south zone environment initiated early flowering and an extended reproductive period, thus sustaining yield with good seed size. While in low rainfall areas viz., Sriganganagar, New Delhi, Durgapura, and Sagar, the yield was comparatively low irrespective of genotypes. Correlation results and PCA indicated that rainfall during the crop season and relative humidity significantly and positively influenced grain yield. Hence, the present study suggests that the yield potential of mungbean is independent of crop phenological dynamics; rather, climatic variables like rainfall and relative humidity have considerable influence on yield. Further, HA-GGE biplot analysis identified Sagar, New Delhi, Sriganganagar, Durgapura, Warangal, Srinagar, Kanpur, and Mohanpur as the ideal testing environments, which demonstrated high efficiency in the selection of new genotypes with wider adaptability.
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Affiliation(s)
| | - Sanjeev Gupta
- Indian Council of Agricultural Research, Krishi Bhawan, New Delhi, India
| | - Kali K. Hazra
- ICAR-Indian Institute of Pulses Research, Kanpur, India
| | | | | | - Deepak Singh
- ICAR-Indian Agricultural Statistics Research Institute, New Delhi, India
| | - Raju Kumar
- ICAR-Indian Agricultural Statistics Research Institute, New Delhi, India
| | - Anil K. Singh
- ICAR-Indian Institute of Pulses Research, Kanpur, India
| | - Rakesh Vaishnavi
- Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST), Srinagar, India
| | | | - Sankar P. Das
- ICAR Research Complex for North Eastern Hilly Region, Agartala, India
| | - Jai Dev
- Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Palampur, India
| | - Rajesh K. Yadav
- Chaudhary Charan Singh Haryana Agricultural University, Hisar, India
| | - B. S. Jamwal
- Pulses Research Sub-Station, SKUAST-Jammu, Srinagar, India
| | | | - O. P. Khedar
- Rajasthan Agricultural Research Institute, Jaipur, India
| | | | | | - R. K. Panwar
- Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India
| | - Manoj Katiyar
- Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, India
| | - Pankaj Kumar
- Acharya Narendra Deva University of Agriculture and Technology, Ayodhya, India
| | - C. S. Mahto
- Birsa Agricultural University, Ranchi, India
| | - H. K. Borah
- Regional Agricultural Research Station, Shillongani, India
| | - M. N. Singh
- Institute of Agricultural Science, BHU, Varanasi, India
| | - Arpita Das
- Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - A. N. Patil
- Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Pulses Research Unit, Akola, India
| | - H. C. Nanda
- Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Vinod Kumar
- Jawaharlal Nehru Krishi Vishwa Vidyalaya, Regional Agricultural Research Station, Sagar, India
| | | | | | - M. H. Patel
- Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushi Nagar, India
| | - Raja R. Kanwar
- S.G. College of Agriculture and Research Station, Jagdalpur, India
| | - Jitendra Kumar
- Rajmohni Devi College of Agriculture and Research Station, Ambikapur, India
| | - S. P. Mishra
- Mahatma Gandhi Chitrakoot Gramodaya Vishwavidyalaya, Chitrakoot, India
| | - Hitesh Kumar
- Banda University of Agriculture and Technology, Banda, India
| | - Indu Swarup
- Regional Research Centre on Pulses, College of Agriculture, Indore, India
| | - Suma Mogali
- University of Agricultural Sciences (UAS), Dharwad, India
| | - D. Kumaresan
- Tamil Nadu Agricultural University (TNAU), Coimbatore, India
| | | | - M. Byre Gowda
- University of Agricultural Sciences, Gandhi Krishi Vigyana Kendra (GKVK), Bangalore, India
| | | | - Polneni J. Rao
- Regional Agricultural Research Station (PJTSAU), Warangal, India
| | - D. Shivani
- PJTSA-Agricultural Research Station, Madhira, India
| | - A. M. Prusti
- Odisha University of Agriculture and Technology, Bhubaneswar, India
| | - P. Mahadevu
- College of Agriculture, UAS, GKVK, Mandya, India
| | - K. Iyanar
- Tamil Nadu Agricultural University (TNAU), Coimbatore, India
| | - Sujata Das
- Odisha University of Agriculture and Technology, Bhubaneswar, India
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Khan AA, Ahlawat A, Sharma A, Deshmukh P, Singh MN, Sagdeo A, Sathe V, Karnal AK, Satapathy S. Spin reorientation transition and coupled spin-lattice dynamics of Sm 0.6Dy 0.4FeO 3. J Phys Condens Matter 2020; 32:405807. [PMID: 32544889 DOI: 10.1088/1361-648x/ab9d4e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
In this work, we have presented a solid-solution of Sm0.6Dy0.4FeO3in the form of nano-particles having spin reorientation transition (SRT) at a temperature interval of 220-260 K. The lattice dynamics of Sm0.6Dy0.4FeO3have investigated by temperature-dependent x-ray diffraction and Raman spectroscopy. A negative thermal expansion at low temperatures has observed, which might be due to the interaction between Sm3+and Fe3+sublattice. Anomalous behavior in lattice parameters, octahedral tilt angle, and bond lengths have observed in the vicinity of SRT, which confirms the existence of magneto-elastic coupling in the system. The strong anomaly has observed in linewidth and phonon frequencies of Raman modes around SRT, which may be related to the spin-phonon coupling in Sm0.6Dy0.4FeO3. The contribution of SRT in lattice change and the presence of spin-phonon coupling can help to understand the correlation between the magnetic and structural properties of orthoferrite.
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Affiliation(s)
- Azam Ali Khan
- Laser and Functional Materials Division, Raja Ramanna Centre for Advanced Technology, Indore-452013, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai-400094, India
| | - Anju Ahlawat
- Laser and Functional Materials Division, Raja Ramanna Centre for Advanced Technology, Indore-452013, India
| | - A Sharma
- Indian Institute of Technology, Bombay, Mumbai 400076, India
| | - Pratik Deshmukh
- Laser and Functional Materials Division, Raja Ramanna Centre for Advanced Technology, Indore-452013, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai-400094, India
| | - M N Singh
- Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452017, India
| | - Archna Sagdeo
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai-400094, India
- Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452017, India
| | - Vasant Sathe
- UGC-DAE Consortium for Scientific Research, Indore Centre, 452017, India
| | - A K Karnal
- Laser and Functional Materials Division, Raja Ramanna Centre for Advanced Technology, Indore-452013, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai-400094, India
| | - S Satapathy
- Laser and Functional Materials Division, Raja Ramanna Centre for Advanced Technology, Indore-452013, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai-400094, India
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5
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Thangswamy M, Maheshwari P, Dutta D, Bera AK, Singh MN, Sinha AK, Yusuf SM, Pujari PK. Evolution of confined ice nano structures at different levels of pore filling: a synchrotron based X-ray diffraction study. Phys Chem Chem Phys 2020; 22:14309-14317. [PMID: 32567617 DOI: 10.1039/d0cp01988g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We have thoroughly investigated the crystal structure of ice evolved from super cooled water confined in MCM-41 cylindrical nano pores through a synchrotron-based X-ray diffraction (XRD) technique for two different levels of pore filling. A rigorous analysis of XRD data shows that the nucleation dynamics and the structure of nucleated ice highly depend on the level of pore filling. In the nearly fully hydrated pores, ice crystallites start nucleating inside the pores below 240 K and creep out of the pores to form bulk crystals having crystalline structure of a mixed phase of hexagonal and cubic forms. In the partially hydrated pores, on the other hand, ice crystals cannot creep out of the pore crossing the energy barrier. The crystalline ice particles remaining inside the cylindrical pore show a short range "cubic rich" structure. The "pure cubic" phase has not been identified at either of the pore fillings in these 2.5 nm average size pores. A large fraction of water inside the pores remains in the super cooled liquid phase even at 180 K. This observation is relevant for understanding the ice nucleation through the pore condensation and freezing mechanism, which is a major pathway for the formation of cirrus clouds in the upper atmosphere.
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Affiliation(s)
| | - Priya Maheshwari
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. and Homi Bhabha National Institute, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Dhanadeep Dutta
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. and Homi Bhabha National Institute, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - A K Bera
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - M N Singh
- Synchrotron Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore-452013, India
| | - Anil K Sinha
- Synchrotron Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore-452013, India
| | - S M Yusuf
- Homi Bhabha National Institute, Bhabha Atomic Research Centre, Mumbai-400085, India and Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Pradeep K Pujari
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. and Homi Bhabha National Institute, Bhabha Atomic Research Centre, Mumbai-400085, India
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Sahani PK, Sinha AK, Haridas G, Singh MN, Puntambekar TA. Application of XANES in gamma dosimetry. Appl Radiat Isot 2019; 149:48-51. [PMID: 31026791 DOI: 10.1016/j.apradiso.2019.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 01/21/2019] [Accepted: 04/05/2019] [Indexed: 11/29/2022]
Abstract
The thermoluminescence material, CaSO4:Dy, is widely used for the dosimetry of ionizing radiation due to its high sensitivity, low fading and wide dose range from μGy to few tens of gray. However, its application is limited at high doses due to non-linear and saturation effects. In this paper, X-ray Absorption Near Edge Structure (XANES) studies at the Dy L3-edge have been carried out on CaSO4:Dy discs exposed to gamma doses in the range 0-1000 Gy. The results show an increase in white line in XANES spectra with gamma dose. Structural change in CaSO4:Dy also has been studied using X-Ray Diffraction (XRD) and has found no structural change up to 1000 Gy. The study indicates that XANES can be used as an alternative dosimetry technique and is useful in the evaluation of absorbed dose in the case of accidental exposure to high radiation in a radiation facility or during a radiological accident.
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Affiliation(s)
- P K Sahani
- Beam Diagnostics & Coolant Systems Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India.
| | - A K Sinha
- Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India; Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India
| | - G Haridas
- Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, Maharashtra, India
| | - M N Singh
- Synchrotrons Utilization Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India
| | - T A Puntambekar
- Beam Diagnostics & Coolant Systems Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India
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Majhi A, Pradhan PC, Jena S, Singh MN, Nayak M, Rai SK, Udupa DV. Understanding of stress and its correlation with microstructure near the layer continuous limit in nano-scaled multilayers. J Appl Crystallogr 2019. [DOI: 10.1107/s1600576719001092] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The evolution of residual stress and its correlation with microstructure are investigated systematically in nano-scaled periodic W/B4C multilayers (MLs) as a function of individual layer thicknesses at the ultra-thin limit (∼0.4–3 nm). Details of the microstructure are accessed through hard X-ray reflectivity and X-ray diffuse scattering (rocking scan) measurements. To understand the contributions of stresses in the layers of each type of material to the total stress in ML films, both the total stress in MLs and the stress in nanocrystalline W layers are analyzed and correlated. It is observed that the physical properties of the materials as well as their interfacial morphology undergo significant modification as the layer thickness varies from the continuous to the quasi-discontinuous regime. A non-monotonic variation of compressive total residual stress in the MLs is observed as a function of thicknesses of W and B4C and explained using a model of the mechanism of film growth. The observed value of in-plane total compressive residual stress of W/B4C MLs is less than the residual stress in W layers in the MLs, which indicates that the net combined stress from B4C layers and interfaces is tensile in nature. The observed compressive stress and the increase of lattice spacing with respect to the stress-free structure in W layers provide evidence of a peening effect. The observed higher surface density of grains with smaller average size and phase formation also provide high compressive stress in W layers.
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Bhakar A, Pandey AH, Singh MN, Upadhyay A, Sinha AK, Gupta SM, Ganguli T, Rai SK. Effect of processing parameters on microstructural properties of lead magnesium niobates. Acta Crystallogr B Struct Sci Cryst Eng Mater 2017. [DOI: 10.1107/s2052520617012872] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The synchrotron powder X-ray diffraction (XRD) and subsequent detailed Rietveld analysis of lead magnesium niobate (PMN) samples were performed to study the microstructural properties of polar nanoregions (PNRs) of the R3m phase. PMN samples were synthesized under different sample processing conditions. The line profile broadening analysis of room-temperature synchrotron powder XRD patterns was performed using the multi-phase Rietveld refinement method for isotropic microstructural evaluation of different PMN samples. The two phases of perovskite PMN considered in the Rietveld refinement approach for satisfactorily fitting the XRD patterns are the paraelectric cubic phase (Pm\overline 3m) and the local rhombohedral phase (R3m) which corresponds to the PNRs. It is observed that the contributions of the Gaussian component of size broadening of the polar rhombohedral phase (R3m) and the Lorentzian component of strain broadening of the paraelectric cubic phase (Pm\overline 3m) are apposite for satisfactory Rietveld refinement of the synchrotron XRD data for all PMN samples. The volume-average crystallite size of PNRs (R3m phase) is almost invariant (approximately 12 nm) with increasing processing temperature while their weight percentage increases. The values of the apparent microstrain in the paraelectric cubic phase (Pm\overline 3m) are larger for hot-pressed samples.
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Bhakar A, Pandey AH, Singh MN, Upadhyay A, Sinha AK, Gupta SM, Ganguli T. Structural analysis of lead magnesium niobate using synchrotron powder X-ray diffraction and the Rietveld method. Acta Crystallogr B Struct Sci Cryst Eng Mater 2016; 72:404-409. [PMID: 27240772 DOI: 10.1107/s2052520616006508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 04/18/2016] [Indexed: 06/05/2023]
Abstract
The room-temperature synchrotron powder X-ray diffraction pattern of the single phase perovskite lead magnesium niobate (PMN) has shown significant broadening in the q range ∼ 5-7 Å(-1) compared with standard LaB6 synchrotron powder X-ray diffraction data, taken under similar conditions. This broadening/asymmetry lies mainly towards the lower 2θ side of the Bragg peaks. Attempts to fit this data with the paraelectric cubic phase (Pm\bar 3m) and the local rhombohedral phase (R3m) corresponding to polar nanoregions (PNRs) are made using the Rietveld method. Rietveld refinements show that neither cubic (Pm\bar 3m) nor rhombohedral (R3m) symmetry can fit this XRD pattern satisfactorily. The two-phase refinement fits the experimental data satisfactorily and suggests that the weight percentage of the PNRs is approximately 12-16% at room temperature. The unit-cell volume of these rhombohedral PNRs is approximately 0.15% larger than that of the unit cell volume of the paraelectric cubic phase.
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Affiliation(s)
- Ashok Bhakar
- Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
| | - Adityanarayan H Pandey
- Laser Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
| | - M N Singh
- Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
| | - Anuj Upadhyay
- Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
| | - A K Sinha
- Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
| | - S M Gupta
- Laser Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
| | - Tapas Ganguli
- Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
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Singh D, Sinha B, Rai VP, Singh MN, Singh DK, Kumar R, Singh AK. Genetics of Fusarium Wilt Resistance in Pigeonpea (Cajanus cajan) and Efficacy of Associated SSR Markers. Plant Pathol J 2016; 32:95-101. [PMID: 27147929 PMCID: PMC4853099 DOI: 10.5423/ppj.oa.09.2015.0182] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 11/18/2015] [Accepted: 11/30/2015] [Indexed: 06/05/2023]
Abstract
Inheritance of resistance to Fusarium wilt (FW) disease caused by Fusarium udum was investigated in pigeonpea using four different long duration FW resistant genotypes viz., BDN-2004-1, BDN-2001-9, BWR-133 and IPA-234. Based on the F2 segregation pattern, FW resistance has been reported to be governed by one dominant gene in BDN-2004-1 and BDN-2001-9, two duplicate dominant genes in BWR-133 and two dominant complimentary genes in resistance source IPA-234. Further, the efficacy of six simple sequence repeat (SSR) markers namely, ASSR-1, ASSR-23, ASSR-148, ASSR-229, ASSR-363 and ASSR-366 reported to be associated with FW resistance were also tested and concluded that markers ASSR-1, ASSR-23, ASSR-148 will be used for screening of parental genotypes in pigeonpea FW resistance breeding programs. The information on genetics of FW resistance generated from this study would be used, to introgress FW resistance into susceptible but highly adopted cultivars through marker-assisted backcross breeding and in conventional breeding programs.
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Affiliation(s)
- Deepu Singh
- Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh,
India
| | - B. Sinha
- Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh,
India
| | - V. P. Rai
- Agricultural Research Station, Tanchha, Bharuch, Navsari Agricultural University, Navsari- 396 450, Gujarat,
India
| | - M. N. Singh
- Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh,
India
| | - D. K. Singh
- Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh,
India
| | - R. Kumar
- Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh,
India
| | - A. K. Singh
- College of Agriculture and Research Station, Korea- 497 335, Chhattisgarh,
India
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Singh MN, Raina OK, Sankar M, Rialch A, Tigga MN, Kumar GR, Banerjee PS. Molecular detection and genetic diversity of Babesia gibsoni in dogs in India. Infect Genet Evol 2016; 41:100-106. [PMID: 27020545 DOI: 10.1016/j.meegid.2016.03.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 03/20/2016] [Accepted: 03/23/2016] [Indexed: 11/24/2022]
Abstract
Babesia gibsoni is a tick borne intraerythrocytic protozoan parasite causing piroplasmosis in dogs and has been predominantly reported in Asian countries, including Japan, Korea, Taiwan, Malaysia, Bangladesh and India. The present communication is the first evidence on the genetic diversity of B. gibsoni of dogs in India. Blood samples were collected from 164 dogs in north and northeast states of India and 13 dogs (7.9%) were found positive for B. gibsoni infection by microscopic examination of blood smears. Molecular confirmation of these microscopic positive cases for B. gibsoni was carried out by 18S rRNA nested-PCR, followed by sequencing. Nested-PCR for the 18S rRNA gene was also carried out on microscopically B. gibsoni negative samples that detected a higher percentage of dogs (28.6%) infected with B. gibsoni. Genetic diversity in B. gibsoni in India was determined by studying B. gibsoni thrombospondin-related adhesive protein (BgTRAP) gene fragments (855bp) in 19 isolates from four north and northeast states of India. Phylogenetic analysis of the BgTRAP gene revealed that B. gibsoni parasite in India and Bangladesh formed a distinct cluster away from other Asian B. gibsoni isolates available from Japan, Taiwan and Korea. In addition, tandem repeat analysis of the BgTRAP gene clearly showed considerable genetic variation among Indian isolates that was shared by B. gibsoni isolates of Bangladesh. These results suggested that B. gibsoni parasites in a different genetic clade are endemic in dogs in India and Bangladesh. Further studies are required for better understanding of the genetic diversity of B. gibsoni prevalent in India and in its neighbouring countries.
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Affiliation(s)
- M N Singh
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, India
| | - O K Raina
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, India.
| | - M Sankar
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, India
| | - Ajayta Rialch
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, India
| | - M N Tigga
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, India
| | - G Ravi Kumar
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, India
| | - P S Banerjee
- Division of Parasitology, Indian Veterinary Research Institute, Izatnagar, India
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Singh AK, Rai VP, Chand R, Singh RP, Singh MN. Genetic diversity studies and identification of SSR markers associated with Fusarium wilt (Fusarium udum) resistance in cultivated pigeonpea (Cajanus cajan). J Genet 2014; 92:273-80. [PMID: 23970083 DOI: 10.1007/s12041-013-0266-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Genetic diversity and identification of simple sequence repeat markers correlated with Fusarium wilt resistance was performed in a set of 36 elite cultivated pigeonpea genotypes differing in levels of resistance to Fusarium wilt. Twenty-four polymorphic sequence repeat markers were screened across these genotypes, and amplified a total of 59 alleles with an average high polymorphic information content value of 0.52. Cluster analysis, done by UPGMA and PCA, grouped the 36 pigeonpea genotypes into two main clusters according to their Fusarium wilt reaction. Based on the Kruskal-Wallis ANOVA and simple regression analysis, six simple sequence repeat markers were found to be significantly associated with Fusarium wilt resistance. The phenotypic variation explained by these markers ranged from 23.7 to 56.4%. The present study helps in finding out feasibility of prescreened SSR markers to be used in genetic diversity analysis and their potential association with disease resistance.
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Affiliation(s)
- A K Singh
- Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanas 221 005, India
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13
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Singh NK, Agrawal A, Singh MN, Kumar V, Godhra M, Gupta A, Yadav DP, Singh RG, Singh TB. Prevalence and pattern of antiphospholipid antibody syndrome in a hospital based longitudinal study of 193 patients of systemic lupus erythematosus. J Assoc Physicians India 2013; 61:623-626. [PMID: 24772699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Antiphospholipid antibody syndrome (APS) is a systemic autoimmune disease characterised by thrombophilic state and obstetrical complications. Prevalence of APS varies in different parts of the world. So this study was conducted to find out the prevalence and pattern of APS in systemic lupus erythematosus (SLE) in this region. MATERIAL AND METHODS In this hospital based longitudinal study from 2004 to 2011, we studied 193 patients of systemic lupus erythematosus (SLE) for prevalence of APS and its different characteristics. The diagnosis of SLE was made according to American College of Rheumatology (ACR) criteria and diagnosis of APS was made according to Sapporo criteria. RESULTS Prevalence of APS in SLE was 25.38%. Mean age at study entry was 25.5 +/- 6.9 years and majority of APS patients were in the age group 21-30 yrs (44.89%). The most common clinical manifestation in both SLE with APS and SLE without APS was musuloskeletal involvement (79.59% and 84.72% respectively). Among 49 patients of SLE having APS, multisystem involvement was present in 16 patients and life threatening complications were present in 12 patients. Late foetal loss was the most common obstetrical manifestation of APS (26.53%) and deep vein thrombosis was most common thrombotic manifestation (16.32%). Anticardiolipin antibodies(IgG aCL) were the most common antibody (85.71%) detected. Lupus anticoagulant was present in 71.42% cases of SLE having APS. ANA and anti-dsDNA antibodies were present in 97.95% and 77.55% cases of SLE having APS. CONCLUSION APS is a major cause of morbidity and mortality in patients of SLE. The incidence of secondary APS in SLE varies in different geographical regions and it was 25.38% in our study. Pregnancy morbidity and deep vein thrombosis were the most common complications of APS. IgG aCL was the most common antibody in APS patients. Screening for the presence of aPL antibodies in SLE patients and timely initiation of prophylactic treatment can prevent many of the complications.
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Sharma LC, Falodia J, Kalla K, Kalla M, Gupta JB, Gupta SS, Beniwal P, Singh MN, Malhotra V, Agarwal D. Esophageal histoplasmosis in a renal allograft recipient. Saudi J Kidney Dis Transpl 2013; 24:764-767. [PMID: 23816727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
Histoplasmosis is a progressive granulomatous disease caused by the intracellular dimorphic fungus Histoplasma capsulatum. We report a rare case of esophageal histoplasmosis in a renal allograft recipient. A 55-year-old male who received a live, unrelated renal allograft 20 years ago presented with complaints of recurrent fever for ten to 12 months, weight loss over six months, progressive dysphagia more for solids for five to six months and joint pain and swelling involving the bilateral metacarpo-phalangeal and proximal interphalangeal joints. Biopsy from the esophageal ulcers revealed dense inflammation infiltrated with lymphocytes and macrophages with clusters of strongly positive intracellular fungal spores with a clear area or "halo-like" zone suggestive of Histoplasma capsulatum invasion. The patient was treated with intravenous liposomal amphotericin B for ten days and later switched over to oral itraconazole. Repeated endoscopy revealed significant improvement of the lesions.
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Affiliation(s)
- L C Sharma
- Department of Nephrology, SMS Hospital and Medical College, Jaipur, India
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Gupta SS, Beniwal P, Singh MN, Malhotra V, Agarwal D, Sharma LC, Falodia J, Kalla K, Kalla M, Gupta JB. Esophageal histoplasmosis in a renal allograft recipient. Saudi J Kidney Dis Transpl 2013. [DOI: 10.4103/1319-2442.113874] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Pande R, Mishra HN, Singh MN. Microwave drying for safe storage and improved nutritional quality of green gram seed (Vigna radiata). J Agric Food Chem 2012; 60:3809-3816. [PMID: 22423886 DOI: 10.1021/jf204540n] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The present study describes the effect of the microwave-heating method on disinfestations and physico characteristics, viz., grain size, grain hardness, and nutritional quality, of the stored green gram seed. It has been observed that the use of the microwave-heating method not only prolongs the storage duration of the green gram seed but also enhances its nutritional quality. The effect of independent parameters, viz., microwave power level and time of exposure, on the moisture content, insect mortality, color, and antinutrient factor (phyic acid) was optimized using response surface methodology (RSM), with the optimized value for power of 808 W and time at 80 s. The optimally treated green gram seed has 8.9% moisture, 99.5% insect mortality, 2.22 Δa* (green color of seed), and 591.79 mg/100 g of antinutrient factor (phytic acid). The grain size (geometric mean diameter, D(m)) of the control (untreated) sample was 3.75 mm, and that of the microwave-treated sample using optimum conditions was 3.99 mm. The grain hardness of the control sample was 3.31 kg, and that of the microwave-treated sample using optimum conditions was 1.305 kg. In vitro protein digestibility (IVPD) of the control (untreated) sample was 83 ± 0.289%, and that of the microwave-treated sample using optimum conditions was 85 ± 0.296%. These values are significantly difference (p < 0.05). The mineral elements studied were Zn, Fe, Mg, Mn, Cu, K, Ca, and Na. The microwave treatment resulted in a non-significant (p < 0.05) effect for Mg, Mn, Cu, K, and Na but a significant (p < 0.05) effect for Zn, Ca, and Fe. The results indicate that the microwave heating not only increases the insect mortality but also reduces the moisture content and antinutritional factor (phytic acid), while the natural green color of the seed is not affected much. This study provides a novel and environmentally safe technique and increase in the nutritive quality.
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Affiliation(s)
- Ranjana Pande
- Department of Agricultural and Food Engineering, Indian Institute of Technology (IIT), Kharagpur, India.
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Ahmed M, Singh MN, Bera AK, Bandyopadhyay S, Bhattacharya D. Molecular basis for identification of species/isolates of gastrointestinal nematode parasites. ASIAN PAC J TROP MED 2012; 4:589-93. [PMID: 21914532 DOI: 10.1016/s1995-7645(11)60152-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 05/17/2011] [Accepted: 06/15/2011] [Indexed: 11/18/2022] Open
Abstract
Gastrointestinal (GI) parasitism is the most serious constraint throughout the world in small ruminants which causes significant production loss in animals. GI parasites are major contributor to reduce productivity in terms of meat, milk and wool in animals. Control of GI parasite is done primarily by anthelmintic treatment where choice and schedule of treatment is done after identification and quantitation of individual parasite. Identification of GI parasites is done through microscopic method by identifying specific morphological characteristics of egg and larva (L(3)). Since most of parasite eggs are having similar morphological characteristics, identification up to species level through microscopy is not possible in most of cases. To address this issue, molecular techniques are the viable alternative for identification of species as well as molecular level differences within a species (isolates) of parasites. Different DNA based molecular techniques viz. PCR, AFLP, RAPD, RFLP, PCR-SSCP, real time PCR, DNA microarray etc. have been used for identification and to assess the genetic diversity among parasite population. For identification of species, the characteristic sequence of genomic DNA of different species should differ to allow the delineation of species, but at the same time, no/minor variation within the species should exist. In contrast, for purpose of identifying population variants (strains/isolates), a considerable degree of variation in the sequence should exist within a species. Various target regions, including nuclear ribosomal DNA (rDNA), mitochondrial DNA (mtDNA) or repetitive DNA elements (microsatellite loci), which show considerable variation in the number of repeats within individuals have been employed to achieve the identification of parasites species or strain.
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Affiliation(s)
- M Ahmed
- Eastern Regional Station of Indian veterinary Research Institute, 37 Belgachia Road, Kolkata, West Bengal, India
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Varshney RK, Penmetsa RV, Dutta S, Kulwal PL, Saxena RK, Datta S, Sharma TR, Rosen B, Carrasquilla-Garcia N, Farmer AD, Dubey A, Saxena KB, Gao J, Fakrudin B, Singh MN, Singh BP, Wanjari KB, Yuan M, Srivastava RK, Kilian A, Upadhyaya HD, Mallikarjuna N, Town CD, Bruening GE, He G, May GD, McCombie R, Jackson SA, Singh NK, Cook DR. Pigeonpea genomics initiative (PGI): an international effort to improve crop productivity of pigeonpea (Cajanus cajan L.). Mol Breed 2010; 26:393-408. [PMID: 20976284 PMCID: PMC2948155 DOI: 10.1007/s11032-009-9327-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Accepted: 08/05/2009] [Indexed: 05/18/2023]
Abstract
Pigeonpea (Cajanus cajan), an important food legume crop in the semi-arid regions of the world and the second most important pulse crop in India, has an average crop productivity of 780 kg/ha. The relatively low crop yields may be attributed to non-availability of improved cultivars, poor crop husbandry and exposure to a number of biotic and abiotic stresses in pigeonpea growing regions. Narrow genetic diversity in cultivated germplasm has further hampered the effective utilization of conventional breeding as well as development and utilization of genomic tools, resulting in pigeonpea being often referred to as an 'orphan crop legume'. To enable genomics-assisted breeding in this crop, the pigeonpea genomics initiative (PGI) was initiated in late 2006 with funding from Indian Council of Agricultural Research under the umbrella of Indo-US agricultural knowledge initiative, which was further expanded with financial support from the US National Science Foundation's Plant Genome Research Program and the Generation Challenge Program. As a result of the PGI, the last 3 years have witnessed significant progress in development of both genetic as well as genomic resources in this crop through effective collaborations and coordination of genomics activities across several institutes and countries. For instance, 25 mapping populations segregating for a number of biotic and abiotic stresses have been developed or are under development. An 11X-genome coverage bacterial artificial chromosome (BAC) library comprising of 69,120 clones have been developed of which 50,000 clones were end sequenced to generate 87,590 BAC-end sequences (BESs). About 10,000 expressed sequence tags (ESTs) from Sanger sequencing and ca. 2 million short ESTs by 454/FLX sequencing have been generated. A variety of molecular markers have been developed from BESs, microsatellite or simple sequence repeat (SSR)-enriched libraries and mining of ESTs and genomic amplicon sequencing. Of about 21,000 SSRs identified, 6,698 SSRs are under analysis along with 670 orthologous genes using a GoldenGate SNP (single nucleotide polymorphism) genotyping platform, with large scale SNP discovery using Solexa, a next generation sequencing technology, is in progress. Similarly a diversity array technology array comprising of ca. 15,000 features has been developed. In addition, >600 unique nucleotide binding site (NBS) domain containing members of the NBS-leucine rich repeat disease resistance homologs were cloned in pigeonpea; 960 BACs containing these sequences were identified by filter hybridization, BES physical maps developed using high information content fingerprinting. To enrich the genomic resources further, sequenced soybean genome is being analyzed to establish the anchor points between pigeonpea and soybean genomes. In addition, Solexa sequencing is being used to explore the feasibility of generating whole genome sequence. In summary, the collaborative efforts of several research groups under the umbrella of PGI are making significant progress in improving molecular tools in pigeonpea and should significantly benefit pigeonpea genetics and breeding. As these efforts come to fruition, and expanded (depending on funding), pigeonpea would move from an 'orphan legume crop' to one where genomics-assisted breeding approaches for a sustainable crop improvement are routine.
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Affiliation(s)
- R. K. Varshney
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh 502324 India
- Genomics Towards Gene Discovery Subprogramme, Generation Challenge Program (GCP), c/o CIMMYT, Int APDO Postal 6-641, 06600 Mexico DF, Mexico
| | - R. V. Penmetsa
- Department of Plant Pathology, University of California, 354 Hutchison Hall, One Shields Avenue, Davis, CA 95616-8680 USA
| | - S. Dutta
- National Research Centre on Plant Biotechnology, IARI Campus, New Delhi, 110 012 India
| | - P. L. Kulwal
- Dr. Panjabrao Deshmukh Agricultural University (PDAU), Krishinagar, Akola, Maharasthra 444 104 India
| | - R. K. Saxena
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh 502324 India
| | - S. Datta
- Indian Institute of Pulses Research (IIPR), Kanpur, Uttar Pradesh 208024 India
| | - T. R. Sharma
- National Research Centre on Plant Biotechnology, IARI Campus, New Delhi, 110 012 India
| | - B. Rosen
- Department of Plant Pathology, University of California, 354 Hutchison Hall, One Shields Avenue, Davis, CA 95616-8680 USA
| | - N. Carrasquilla-Garcia
- Department of Plant Pathology, University of California, 354 Hutchison Hall, One Shields Avenue, Davis, CA 95616-8680 USA
| | - A. D. Farmer
- National Center for Genome Resources (NCGR), 2935 Rodeo Park Drive East, Santa Fe, NM 87505 USA
| | - A. Dubey
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh 502324 India
| | - K. B. Saxena
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh 502324 India
| | - J. Gao
- Department of Plant Pathology, University of California, 354 Hutchison Hall, One Shields Avenue, Davis, CA 95616-8680 USA
| | - B. Fakrudin
- University of Agricultural Sciences, Dharwad, Karnataka 580005 India
| | - M. N. Singh
- Banaras Hindu University, Varanasi, Uttar Pradesh 221005 India
| | - B. P. Singh
- National Research Centre on Plant Biotechnology, IARI Campus, New Delhi, 110 012 India
| | - K. B. Wanjari
- Dr. Panjabrao Deshmukh Agricultural University (PDAU), Krishinagar, Akola, Maharasthra 444 104 India
| | - M. Yuan
- Tuskegee University, Tuskegee, AL 36088 USA
| | - R. K. Srivastava
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh 502324 India
| | - A. Kilian
- Diversity Arrays Technology Pty Ltd, 1 Wilf Crane Crescent, Yarralumla, ACT 2600 Australia
| | - H. D. Upadhyaya
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh 502324 India
| | - N. Mallikarjuna
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh 502324 India
| | - C. D. Town
- J. Craig Venter Institute (JCVI), 9704 Medical Center Drive, Rockville, MD 20850 USA
| | - G. E. Bruening
- Department of Plant Pathology, University of California, 354 Hutchison Hall, One Shields Avenue, Davis, CA 95616-8680 USA
| | - G. He
- Tuskegee University, Tuskegee, AL 36088 USA
| | - G. D. May
- National Center for Genome Resources (NCGR), 2935 Rodeo Park Drive East, Santa Fe, NM 87505 USA
| | - R. McCombie
- Cold Spring Harbor Laboratory, Watson School of Biological Sciences, 1 Bungtown Road, Cold Spring Harbor, NY 11724 USA
| | - S. A. Jackson
- Department of Agronomy, Purdue University, West Lafayette, IN 47907-2054 USA
| | - N. K. Singh
- National Research Centre on Plant Biotechnology, IARI Campus, New Delhi, 110 012 India
| | - D. R. Cook
- Department of Plant Pathology, University of California, 354 Hutchison Hall, One Shields Avenue, Davis, CA 95616-8680 USA
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Reddick CL, Singh MN, Chalmers RJG. Successful treatment of superficial pyoderma gangrenosum associated with hidradenitis suppurativa with adalimumab. Dermatol Online J 2010; 16:15. [PMID: 20804692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
Pyoderma gangrenosum (PG) and hidradenitis suppurativa (HS) are chronic inflammatory dermatoses that can be a challenge to treat. A role for TNF-alpha in their pathogenesis has been postulated in the literature. A therapeutic benefit of infliximab has been reported in recalcitrant cases of both conditions. To date, there is less evidence about the use of adalimumab for these conditions. We report a patient with severe superficial PG on a background of HS, which responded to adalumimab therapy after failure of infliximab therapy.
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Affiliation(s)
- C L Reddick
- The Dermatology Centre, University of Manchester, Salford Royal Foundation Hospital, Manchester, United Kingdom
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Reddick CL, Singh MN, Chalmers RJG. Successful treatment of superficial pyoderma gangrenosum associated with hidradenitis suppurativa with adalimumab. Dermatol Online J 2010. [DOI: 10.5070/d34ph5r1m2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Singh NK, Godara M, Kumar V, Singh MN, Agarwal A, Pandey LK, Usha. P43 Clinico-immunological profile and therapeutic outcome of 169 patients of primary and secondary antiphospholipid syndrome. Indian Journal of Rheumatology 2009. [DOI: 10.1016/s0973-3698(09)60061-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Singh NK, Kumar V, Singh MN, Agarwal A, Pandey LK. O9 Clinico-immunological profile and therapeutic outcome in 118 patients of primary and secondary antiphospholipid syndrome (APS). Indian Journal of Rheumatology 2008. [DOI: 10.1016/s0973-3698(10)60383-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Singh MN, Stringfellow HF, Taylor SE, Ashton KM, Ahmad M, Abdo KR, El-Agnaf OM, Martin-Hirsch PL, Martin FL. Elevated expression of CYP1A1 and -SYNUCLEIN in human ectopic (ovarian) endometriosis compared with eutopic endometrium. Mol Hum Reprod 2008; 14:655-63. [DOI: 10.1093/molehr/gan056] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Singh MN, Singh NK, Agrawal A, Pandey LK, Singh RG, Shukla J. P6 Clinicopathological study and treatment outcome in 31 patients of lupus nephritis. Indian Journal of Rheumatology 2007. [DOI: 10.1016/s0973-3698(10)60333-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Singh MN, Agrawal A, Tilak V, Singh NK. Mucopolysaccharidosis type IV (Morquio syndrome). J Assoc Physicians India 2007; 55:434. [PMID: 17879498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Affiliation(s)
- M N Singh
- Institute of Medical Sciences, Banaras Hindu University, Varanasi - 221005, India
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Mukherjee K, Verma Y, Chakrabarti SK, Singh MN, Khurana SMP. Cloning and sequencing of coat protein gene of an Indian potato leaf roll virus (PLRV) isolate and its similarity with other members of Luteoviridae. Virus Genes 2003; 26:247-53. [PMID: 12876453 DOI: 10.1023/a:1024495129556] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
An Indian strain of potato leaf roll virus (PLRV) was purified to generate complementary DNA corresponding to the coat protein (CP) gene. Virus cDNA was synthesized from purified viral RNA using oligo (dT)-anchor primer and virus specific primers. The viral sequence encoding the coat protein was specifically amplified by polymerase chain reaction (PCR), using specific primers bordering the CP gene. The unique amplified product thus obtained was A-T cloned into the pGEM-T Easy vector and the authenticity of the cloned gene verified by dot blot hybridization and sequence analysis. Run-way-transcripts of the cloned CP gene could detect PLRV in tissue imprints and tissue dilution. The nucleotide sequences and the deduced amino acid sequences were compared with the other PLRV isolates and found to be 97-99% identical at both the nucleotide and amino acid sequence level of other isolates. Multiple sequence alignment of deduced amino acid sequences revealed considerable homology to other luteoviruses. A nuclear localization signal located close to the N-terminus of the CP gene was predicted. This is the first report of PLRV coat protein sequence from an Indian strain.
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Affiliation(s)
- Krishanu Mukherjee
- Division of Plant Pathology, Central Potato Research Institute, Shimla 171 001, H.P., India.
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Jha S, Dhanuka AK, Singh MN. Arsenic poisoning in a family. Neurol India 2002; 50:364-5. [PMID: 12391471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
A family of six members is reported, who accidently consumed arsenic, during preparation of indigenous medicine in their home, and developed arsenic poisoning.
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Affiliation(s)
- S Jha
- Department of Neurology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Raebareli Road, Lucknow - 226 014, India.
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29
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Jha S, Singh MN. Acute transverse myelitis following electrical injury: a short report. Neurol India 2001; 49:321-2. [PMID: 11593258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
We report a 30 years lady who developed transverse myelitis following an accidental electric shock and later recovered completely.
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Affiliation(s)
- S Jha
- Department of Neurology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Raebareli Road, Lucknow-226014, India.
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Abstract
For the first time, Kluver Bucy syndrome (KBS) is described in young children who had no environmental learning of sex. The syndrome has so far been noted only in adults after bilateral temporal lobe affection. A few of its components, especially the hypersexuality and hypermetamorphosis, are likely to manifest differently in very young children. Seven patients in the pre-pubertal age group, who developed KBS as a post-encephalitic sequelae, are described. The patients, 2.5-6 years old, suffered from acute herpes simplex encephalitis (HSE) at 10 months-5.5 years of age and developed KBS on regaining consciousness and ambulation. Altered emotional behaviour, changes in dietary habits, hyperorality and hypersexuality were present in all, while psychic blindness and hypermetamorphosis were noted in a few of the patients. All showed marked indifference and lack of emotional attachment towards their close relatives. Apathy and easy distractibility were rare. Bulimia and strong urge to put non-food items into the mouth were common. Hypersexuality manifested as frequent holding of genitals, intermittent pelvic thrusting movements and rubbing of genitals to the bed on lying prone. Due to lack of environmental learning of sex and also, due to emotional and physical dependence on parents, the manifestations in young children showed modification over those of adults.
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Affiliation(s)
- S Pradhan
- Department of Neurology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.
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31
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Jha S, Singh MN. Acute transverse myelitis following electrical injury. Neurol India 1997; 45:49. [PMID: 29509165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- S Jha
- Department of Neurolgy, SGPGIMS, Lucknow, India
| | - M N Singh
- Department of Neurolgy, SGPGIMS, Lucknow, India
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Abstract
Two patients with central pontine myelinolysis are described for the peculiar mode of development. Both patients were in chronic renal failure and admitted in a stuporous state due to hyponatremia. Both developed central pontine myelinolysis during the hospital stay following slow and judicious correction of hyponatremia. The role of chronicity of hyponatremia prior to its correction, in the genesis of central pontine myelinolysis, particularly in the patients who have chronic debilitating illness, septicemia or malnutrition, is highlighted.
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Affiliation(s)
- S Pradhan
- Department of Neurology, Sanjay Gandhi Post-graduate Institute of Medical Sciences, Lucknow, India
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Bhatia BD, Prakash U, Gupta SK, Singh MN, Satya K. Motor nerve conduction velocity & Hoffman's reflex latency in newborns. Indian J Med Res 1993; 98:227-31. [PMID: 8119757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
A total of 72 newborns and their mothers were studied to assess the influence of various variables on the motor nerve conduction velocity (MNCV) and Hoffman's reflex latency (H-RL) of the babies with a view to differentiate fullterm and preterm low birth weight babies. MNCV were significantly lower and H-RL significantly higher in preterm appropriate for gestational (PT-AGA) age babies compared to fullterm appropriate for gestational age (FT-AGA) and fullterm intrauterine growth retarded babies (FT-IUGR). In FT-IUGR babies, only MNCV was significantly reduced as compared to FT-AGA babies.
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Affiliation(s)
- B D Bhatia
- Department of Paediatrics, Banaras Hindu University, Varanasi
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34
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Bhatia BD, Prakash U, Singh MN, Gupta SK, Satya K. Electrophysiological studies in newborns with reference to gestation and anthropometry. Electromyogr Clin Neurophysiol 1991; 31:55-9. [PMID: 2009827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Fourteen full term appropriate for gestational age (FT-AGA) and 11 preterm appropriate for gestational age (PT-AGA) newborns and their mothers constituted study subjects. The mothers were subjected to hemoglobin and serum albumin estimations. Offsprings were subjected to measurements of weight, crown heel length and head circumference along with motor nerve conduction velocity (MNCV) and H-reflex latency (H-RL) at right median nerve. The MNCV was found to be significantly lower and H-RL significantly higher in PT-AGA babies compared to FT-AGA babies. The gestation, crown heel length of baby and maternal serum albumin status were found to be significant independent variables. Multiple regression equations have been derived using these parameters as determinative variables. These equations explained much higher per cent variation than explained by simple regression equations.
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Affiliation(s)
- B D Bhatia
- Department of Pediatrics, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
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35
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Agarwal DK, Singh MN. Assessment of vitamin A status. Indian Pediatr 1990; 27:427-31. [PMID: 2276767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- D K Agarwal
- Department of Pediatrics, Banaras Hindu University, Varanasi
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Bhatia BD, Prakash U, Gupta SK, Singh MN. Electrophysiological studies (MNCV, H-RL) in full-term newborn babies. Indian Pediatr 1989; 26:1223-6. [PMID: 2638326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Twenty-five full-term newborns and their mothers constituted study subjects. Mothers were subjected to weight and height measurements, as well as, serum albumin and hemoglobin estimations. Offsprings were subjected to measurements of weight, crown heel length and head circumference along with motor nerve conduction velocity (MNCV) and H-reflex latency (H-RL). The MNCV was found to be significantly lower in growth retarded (FT-IUGR) babies compared to appropriately grown babies (FT-AGA) whereas H-RL was similar in both FT-IUGR and FT-AGA babies.
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Das BK, Mishra OP, Singh MN, Garg VK. Histiocytosis X with positive tuberculin test. J Indian Med Assoc 1989; 87:264-5. [PMID: 2634704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Bhatia BD, Chugh SP, Narang P, Singh MN. Bacterial flora in mothers and babies with reference to causative agent in neonatal septicemia. Indian Pediatr 1989; 26:455-9. [PMID: 2599613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
One hundred newborns and their mothers were subjected to aerobic bacterial cultures and sensitivity study from different sites. Out of 36 clinically suspected neonatal septicemia cases, the blood culture was positive for bacterial growth in 24 neonates. The incidence of septicemia in PT-AGA, FT-AGA, FT-SFD and postterm-AGA babies was found to be 50.0, 13.5, 28.1 and 50.0%, respectively. The incidence of septicemia in LBW and FT-AGA babies was found to be 45.3 and 13.5%, respectively. The single major isolate in the positive blood culture was Staphylococcus aureus. In Gram positive septicemia the commonest site for colonization of the same organism in newborn was found to be umbilicus followed by nose, throat and external auditory canal, while in Gram negative septicemia rectum and umbilicus were the commonest sites.
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Bhatia BD, Chug S, Narang P, Singh MN. Bacterial flora of newborns at birth and 72 hours of age. Indian Pediatr 1988; 25:1058-65. [PMID: 3248878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Singh MN, Bhatia BD, Sharma OP. Aplasia cutis congenita. Indian Pediatr 1987; 24:1055-6. [PMID: 3450648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Garg VK, Singh MN, Mishra OP, Gupta R, Bhatia BD, Bhargava V. Neonatal mortality rate: a hospital study. Indian Pediatr 1987; 24:639-43. [PMID: 3443505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Das BK, Garg VK, Singh MN. Disseminated cryptococcosis. Indian Pediatr 1986; 23:227-8. [PMID: 3744489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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